Explosion-engine.



construction, with a slightly dierent' ar- #insfrafrns ramena? onirica.

BERTRON G. HARLEY, OF PITTSBURG, PENNSYLVANIAffASSIGNOR IO W. S. C1 STEVENS, OF

v WOGDLAND, CALIFORNIA. A Y

I isxr:testen-ENemr;.`

y Specification of Letters APatent.

Patented July 27, 179:39.

Application fried August 27, reos. serial No. $32,148.

lTo ,all whom it may concern:

Be itlmown that I, BERTRON AG. HARLEY, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain ynew and useful Improvements in Explosion- 'Enginea 'of which the folIowing is a specification.

' which will require but a small amount of repair and attention, and which can bemade at aminimum of cost, allaswill more parl. ticularly hereinafter appear; V In carrying out my iQvention I'ernploy a type of construction which Ihave illustrated in preferred form in the accompanying drawing, wherein- 4 I Figure 1 is a sectionaliview-shdisuf'ng an engine cylinder with the.' pistontherein and pitman connected to the piston, 'and Figure 2 is a sectional viewof a similar rangement of port openings, but designed to operate on the same general principles.

Referring now more particularly to Figure 1, it will be seen that I have` therein shown an engine cylinder 3 having an upper cylinder head 4 and a lower head 5, and within the cylinder a piston 6 provided with a downwardly extending projection 7 towhich is secured a pitman 8 by means of, a wrist pin 9 which may be inserted in any usual manner,- the pitman S being connected to the crank pin 10, arranged so as to drive the wheel 11 and the shaft 12 upon which the latter is mounted.

It will be observed that at the right of the cylinderrI have arranged an inwardly open- -ing check valve 13, the connection whereof on the cylinder extends into the port or passage marked 14 which registers in the position shown, with the cylinder above the piston,` and also with the chamber below the piston by means of the port opening 15 made' indicated at 23.

the side walls -of thetrunk of the piston,

I f J An eXhaustport forthe'esca e of the products of combustionis provide at 16,' andan upwardly extending bafIiepla-te or wail 1.7 -is arranged onthe up yer face of the piston in order to direct the orce of the mixture upward to sweep out the waste gases more effectively when the charge is being transferred from'the lower side of the-piston to the upper one. In order to provide a tight pack-l ingffor the piston I use the rings `18construct `ed in the ordinary manner, and in order to make a ti ht. fit around the trunk like' extension 7 of t 1e piston I .provide the rings 19 varranged within the lower head 5 in such a manner astO' have a bearing on the outerfface 70 fof thetrunk 7,` and revent the escape ofthe l confined'mixture w ich is in the cylinder below l'thefpistoni f The' sideof the piston is provided with a se- ,ries'0fholes'25 below thepofrt 15 as clearly` 7S shownin'Figu'r'e 1, the purpose of such holes being to retain,communication betr-.veen the front side of'tliex'piston and the port 14 whilek th'e.' iston' vin'g`backward," .whereby rare' icati'onl d e iront' side of the`pisto`1i5 80 Prevlfed after@ Parit has pasted-abe `port r4;d As a means for cooling the cylinddr `I may employ an ordinary' arrangement of water jac et as indicated at 20, or I may provide the cylinder with proj ectin pins or other devices for the circulation of air wherebyfthe temperature may be kept`4 down byI the -air Y cooling process The ctniters vare inserted through the opening 21, and may be of any preferred construction, wherefore they are not shown here in detail.v 5

The operationA of the device is as follows: Assuming the piston to be in the position shown, the mixture of gas and air will enter 4past the checkzvalve 13- and through the below the piston during the downward stroke y of the same, a pressure of say twenty pounds, or more, if desiredf-thaamount of the pres'- `'When the ,piston begins to uncover t e exescape, and on further downward travel of the compresse into the lowergportion of the cylinder, between the lower wall of the cylinder 3 and'the wall of the trunk projection 7 accumulating sure de ending ofcourse upon the clearance allowedland alsothe stro e of'the iston.

haust port 16, the waste gases will begin to I ofthe mixture on the-beginning ofthe down.- 1

ward travel of ,the piston 6, in -a manner which will be clear without further explanation".

In Figure 2 -I have shown a similar arrange`r ment, except-'with respect to the matter of the opening 15 which is omitted in the structure shown inFigure 2, and in place thereof another opening 24 communicating with the passage 14 isemployed, allowing the comf.

pressed mixture to flow around the lower lend of the trunk like extension g3 of the iston 6. The port 1-5 has the advantage-indias ocation of making a shorter distance for the mixture to travel in passing from the lower end of'the cylinder tothe upper one, which must take place very rapidly in engines of this class if i running ata high rate of s eed, as it is neces sary to sweep out the un urned products of combustion at each stroke of the piston. s

Both forms of construction, it is to be observed, have the same peculiar arrangement of the piston 6 provided with the downward trunlrike extension 7 within which 'operates the pltman 8, and have the same means for packing the trunk-like extension 7,-namely, the' rings 19-housed within the lower cylinder head 5, whereby the employment of a stulling box and. cros'shead such as has been heretorfore used in two-cycle engines of this classis avoided, and whereby also the necessity of compressing the mixture below the piston within a cavity open to the crank case is also avoided,L which 1s a .form of construction heretofore used in devices of this character, employed in marine service.

Having thus described m invention and illustrated'its usewhat I c aim as new and desire to secure by Letters Patent, is the following: y y

In combination, a cylinder having an extended admission port intermediate its ends and an exhaust port, and a forwardly extending cu shaped .piston with a series of holes exten ing through the side thereof and arranged longitudinally of the piston whereby a continuous connection is maintained be-v tween' the front side of the piston andthe admission port. e

subscribed witnesses. l BERTRON e. HARLEY.

' Witnesses:

vPAUL SYNNESTVEDT, F. E; GAITHER.

In testimony whereof I- `have hereunto I signed my name in the presence of the two- 

